Results 1 to 10 of 10
  1. #1
    Join Date
    Sep 2007
    Location
    UK
    Age
    32
    Posts
    6
    Rep Power
    0

    What compressor?



    Hi all, i'm new to these forums, and i hope some of you are able to help answer some questions i have...

    I have made a couple of R134a systems, all using 1/8hp - average compressors, however, i now want to go a lot further!!

    I am aiming for the magical 'optimum' running temperature of -178C (or near to)

    some potential gasses..

    Gas Boiling point
    R-14 (-150C @ 350psi)
    R-50 (-162C @ 450psi)
    R-740 (-120C @ 300psi) argon

    However, i haven't a clue where to start off, by finding a compressor capable of handling these temperatures and pressures without forking out thousands of pounds on a cryogenic system
    can anyone please help?
    James
    Last edited by funkybrown; 24-09-2007 at 10:31 PM.



  2. #2
    Join Date
    Apr 2006
    Location
    Not so sunny coast (BC Canada)
    Age
    35
    Posts
    1,646
    Rep Power
    17

    Re: What compressor?

    No offence but clearly you have no idea about what you want to play with. Keep learning and you'll get there.

    Now a more direct answere is there are non you either fork out the cash or learn how to make cascades and there is a ton you'll need to learn to do that safely and reliably.

  3. #3
    Join Date
    Oct 2007
    Location
    Not Sure?
    Posts
    76
    Rep Power
    11

    Re: What compressor?

    I would say it would almost impossible to get that. Why? because you are in liquid nitrogen territory. If someone made a "reliable" system then they would already have it out. These compressors are custom made with oil loops and extended discharge piping in the compressors. Not a stock item. Good luck to you!

  4. #4
    Join Date
    Nov 2006
    Location
    UK
    Age
    57
    Posts
    395
    Rep Power
    12

    Re: What compressor?

    Your talking very dangerous territory here, the pressures you are talking about are way beyond standard refrigeration kit and should you try it you waould have a big hole were the plant used to be if anything went wrong.
    What are you trying to cool?

    Ian

  5. #5
    vwxy950's Avatar
    vwxy950 Guest

    Cool why almost all women have many handbags

    Handbags have been a good accessory in completing women's outfit. There are a wide variety of handbags that come in different styles, designs, materials, colors and sizes. These accessories have great significance because of their versatility features. Both men and women carry bags, however, it is just well-known that women use them more than men. Furthermore, handbags are also use to create a fashion statement. Different designs and styles are born each year. Celebrities and popular TV icons are often the first to try trendy handbags to complete their looks.Different variety of handbags were basically designed for different purposes. And to make it widely available to everyone, such fashion accessories are now available in different variety of designs, styles and colors to incorporate with different wardrobes. This is the reason why almost all women have 3-5 different types of handbags in their closet

  6. #6
    Join Date
    Oct 2002
    Location
    Hampshire
    Posts
    160
    Rep Power
    16

    Re: What compressor?

    Hi, -178C, thats bloody cold lol.
    I have seen a few cascade systems reach -130 on four stages for pc chips and that was using normal hermetic compressor, I think reaching the temperature you desire is going to cost you big $$$$$ money. Good luck :]

  7. #7
    Join Date
    Nov 2005
    Location
    New Zealand
    Posts
    551
    Rep Power
    13

    Re: why almost all women have many handbags

    Quote Originally Posted by vwxy950 View Post
    Handbags have been a good accessory in completing women's outfit. There are a wide variety of handbags that come in different styles, designs, materials, colors and sizes. These accessories have great significance because of their versatility features. Both men and women carry bags, however, it is just well-known that women use them more than men. Furthermore, handbags are also use to create a fashion statement. Different designs and styles are born each year. Celebrities and popular TV icons are often the first to try trendy handbags to complete their looks.Different variety of handbags were basically designed for different purposes. And to make it widely available to everyone, such fashion accessories are now available in different variety of designs, styles and colors to incorporate with different wardrobes. This is the reason why almost all women have 3-5 different types of handbags in their closet


    What the hell has this got to do with the price fish

    Norm
    My wife used to say you never listen to a word I say at least I think that what she said

  8. #8
    LRAC's Avatar
    LRAC is offline Veteran Poster I am starting to push the Mods: of RE
    Join Date
    Sep 2006
    Location
    Midlands
    Posts
    453
    Rep Power
    12

    Re: why almost all women have many handbags

    Quote Originally Posted by Toosh View Post


    What the hell has this got to do with the price fish

    Norm
    Handbags, now fish i suppose the handbags might withstand -178 C until you touched it and fish is very expensive at the minute?
    Grumpy men live longer

  9. #9
    Join Date
    Nov 2008
    Location
    Ireland
    Age
    51
    Posts
    18
    Rep Power
    0

    Re: What compressor?

    I work on factory built autocascades for the semiconductor industry, I have been to the plant in Sharon, Boston USA where they are built, the cascade plumbing assembly is an extremely complex affair, made by a specialist copper tube fabrication house, the compressors used were the Danfoss LTZ/NTZ series and the gases used are typically R134a, R14, R336fa. These older systems achieve typically -70C and are critical charge systems. The company have been working hard on a -95C autocascade using a scroll compressor, and it has been in production only for the last 2 years, I have met some of the top refrigeration design engineers there and they feel that they are pushing things to the limit a bit, tryint to keep ahead of the competition. My point is, that if a major player in autocascades is having to put so much time/expense into getting these low temperatures, then it is beyond the reach of the everyday guy to build such extreme systems safely.

  10. #10
    Join Date
    Jul 2010
    Location
    usa
    Age
    33
    Posts
    16
    Rep Power
    0

    Re: What compressor?

    thanks for your post i am looking for that

Similar Threads

  1. Testing Inverters
    By fridge doctor in forum Air Conditioning
    Replies: 38
    Last Post: 15-06-2011, 06:52 AM
  2. Compressor loading, cooling, and range of operation.
    By Air duster in forum Fundamentals
    Replies: 10
    Last Post: 02-04-2008, 08:39 AM
  3. Mitsubishi compressor lock
    By marc5180 in forum Air Conditioning
    Replies: 29
    Last Post: 08-10-2007, 05:48 PM
  4. Compressor pumping efficiency
    By shogun7 in forum Fundamentals
    Replies: 0
    Last Post: 25-02-2004, 11:50 PM
  5. One Half of a Part Wound Compressor Motor is Burnt
    By aygul in forum Trouble Shooting
    Replies: 2
    Last Post: 25-08-2003, 11:11 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •